PDF malware analysis — malicious · 4048cd3c99a1ed3c

MALICIOUS

PDF

14.5 KB Created: 2009-11-15 19:41:70 Authoring application: PDF Library 4.3.9 (via PDF Library 3.9.7)

MD5: f6df4256e92614529071c9f64a5bd791 SHA-1: dcb31c440a08520e81a7269aa2185b13282feecb SHA-256: 4048cd3c99a1ed3cd9d325d2bf83ed67668a9393bef502c80d9e8ba5db990abb

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file was flagged as malicious by multiple heuristics, including a critical ClamAV detection identifying it as 'Win.Trojan.Agent-36166'. The presence of embedded JavaScript, indicated by 'PDF_JAVASCRIPT' and 'PDF_JS' heuristics, suggests the script is responsible for the malicious behavior. This script likely downloads and executes a second-stage payload, aligning with common PDF-based malware delivery techniques.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

Heuristics 4

ClamAV: Win.Trojan.Agent-36166 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Win.Trojan.Agent-36166
ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV

ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
JavaScript action low PDF_JAVASCRIPT

PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `fd4ad69ae4a5b45edf15e6ce00afa084c12532d14d2fdacfb1ca7f9123a2c7cd`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	74786 bytes
Detection ClamAV: Win.Trojan.Agent-36166 Obfuscation or payload: unlikely

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